After a recent service I was advised to get immediate attention to broken / cracked wishbone bushes at a price of £419 inc VAT. I do not necessarily have a problem with this but the car also passed its MOT at the same service. The car is 4 years old, 19000 miles, no vibration or noises when driving / steering and no undue tyre wear. My question is how can a car require immediate attention but pass its MOT. Is the car safe to drive?